2. amps-preamps
  3. 170195-161963

Subwoofers going into standby with low volume listening (New Integrated Amplifier).

Hello,

Just got a new Integrated amplifier (Technics SU-R1000) and have dual stereo subwoofers connected via the amplifiers preout R/L RCA connections (RCA Y-splitter at each Line In R/L connection) on my KEF 12b sub's.

While listening at low volume my subwoofers keep going into standby mode and turn off. The subwoofers also don't sound very lively at all. I have the crossover and volume at "Max" just to try to hear them and they don't sound loud or overly bass heavy at all, which at max volume would've sounded very over the top with my previous integrated amplifier. I've adjusted the crossover and volume numerous times and the subwoofers are just extremely soft and quiet. I've also adjusted the volume control on my Innuous sense (volume down) and upped the volume on the i-amplifier with no effect at low volume listening.

Wondering what could be causing this, and how to potentially fix it? Would the amps volume attenuator have anything to do with it? Also before I was running my sub's of my power amp loop outputs, which I'm not using now. Then again the technics is rated at 150w@8ohm/300w@4ohm where my power amp was 200w@8ohm/350w@4ohm, so I figured I wouldn't need the power amps yet.

Speakers are JBL L100 Classic 75th Anniversary. And cables are RCA SVS subwoofer cables with a y-splitter off each R/L RCA cable to then you nnect in to both line level R/L ports on my subwoofers.

But dually concerning is that even when I crank up the volume on the subwoofer, they sound extremely tame and subdued.

Any help would be appreciated.

Thanks!
128x128ja_kub_sz

Showing 2 responses by oldhvymec

oldhvymec
5,101 posts
 
It could be the cable, or just to weak of a signal to keep the circuit excited.

I've had a couple of RCA through the years that took a dump and that is exactly how they acted. They would not tickle the Sub plate in standby and had a VERY low out put. Swapped out the RCA and fixed it right up.

Maybe when you swapped out, you damaged the plug or cable OR it's just not plugged in correctly.. check the splitters too..

Regards
oldhvymec
5,101 posts
 
You put a left and right signal into a left and right signal. Put the left into the left NOT the right too. You need to send the left and right signal to the plate, not a single wire and split it. The bass has a left, right (and center mix sometimes). 

Have you tried both left and right from the pre out to a single sub plate? If that works split the signal at the pre out and get a second L,R dual RCA. Use your splitters at the pre out and split the L,R. That is how I do it anyways.
LTE is different, a single cable in from a LTE signal can really make a difference. usually there is a 20-40hz bump (shelf) but you have to plug into the correct side and sometimes there is a switch.

Just thinkin'

Regards
More to discover